During the 1960s and 1970s, now living in obscurity, Shaver searched for physical evidence of the bygone pre-historic races. He claimed to find it in certain rocks, which he believed were "rock books" that had been created by the great ancients and embedded with legible pictures and texts. For years he wrote about the rock books, photographed them, and made paintings of the images he found in them to demonstrate their historic importance. He even ran a "rock book" lending library through the mails, sending a slice of polished agate with a detailed description of what writings, drawings, and photographs were archived by Atlanteans inside the stone using special laser-like devices.